Question

I use a custom attribute in elements with my own class. I’m trying to return the value of custom attribute for all elements of the class.

I used jQuery to find the elements by class, and jQuery places the object in an array.

var tabs = $('li.tab_item');

Now that I’d have the objects in an array, I would like to return the value for the custom attribute for all the array’s members.

How can this be done?

Answer 1

var tab_attribs = $('li.tab_item').map(function () {
  return $(this).attr("custom_attribute");
}).toArray();

This will give you an array of the custom attribute values. Of course, you can do this more traditionally:

var tab_attribs = [];
$('li.tab_item').each(function () {
  tab_attribs.push( $(this).attr("custom_attribute") );
});

Anyway, you should probably make use of the data-* attributes that HTML5 provides:

<li class="tab_item" data-foo="some custom data">

and (see jQuery data()):

$('li.tab_item').data("foo"); // -> "some custom data"